"When people refer to 'organic SEO' (search engine optimization), they almost always use it as a blanket term to describe the unpaid, algorithm-driven results of any particular engine. However, a sophisticated search engine optimization company will often take the meaning of 'organic' one step further. To such companies, the description of 'organic SEO' is not limited to what shows up in the 'natural' search engine results - it includes the methodologies used to achieve such rankings."¹

¹From SearchEngineGuide.com (click to read full article)